Karbon dioksida (CO2) adalah penyumbang utama kepada kesan rumah hijau sejak revolusi perindustrian. Matriks campuran membran (MMM) telah diperkenalkan untuk meningkatkan usaha dalam CO2 penyingkiran. Penyebaran pengisi poros dalam matriks polimer boleh menawarkan peningkatan dramatik untuk mengatasi had di antara kebolehtelapan dan pemilihan membran polimer. Dalam kajian ini, polysulfone MMM digabungkan dengan polyhedral silsesquioxane oligomerik (POSS) telah dicadangkan untuk meningkatkan kebolehtelapan CO2. Membran simetri telah disediakan dengan menggunakan kaedah penyongsangan fasa untuk rintangan pemindahan minimum jisim. Kesan jumlah POSS (2,5-5% berat) pada ciri membran dan prestasi telah dikaji. Tambahan pula, MMMs telah diubah suai menggunakan cecair ionik (IL) [Emim] [TF2N] dengan 0.4 M kepekatan dan polydimethylsiloxane (PDMS) untuk meningkatkan pemilihan gas di MMMs ini. Morfologi pengubahsuaian dengan IL dengan menggunakan mikroskop elektron pengimbas membuktikan penyebaran perigi POSS tertakluk kepada meningkatkan polimer antara muka / pengisi dan EDX analisis telah dijalankan untuk mengesan taburan unsur permukaan membran. Sementara itu FTIR juga telah direkodkan untuk menyemak bon kewujudan dalam sampel. Sifat-sifat pengangkutan gas semua membran direka disiasat menggunakan ujian gas penyerapan tulen N2, CO2 dan CH4 dan juga mendedahkan membran dengan 5% berat jumlah POSS, diubah suai oleh lapisan IL dan PDMS yang mempamerkan memuaskan CO2/ N2 (24) dan CO2/ CH4 (9).
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Carbon dioxide (CO2) is the main contributor to greenhouse effect since industrial revolution. Mixed matrix membrane (MMM) has been introduced to improve the efforts in CO2 removal. Dispersing the porous filler in polymeric matrix can offer dramatic improvement to overcome the tradeoff limitation in between permeability and selectivity of polymeric membrane. In this study, polysulfone MMM incorporated with polyhedral oligomeric silsesquioxane (POSS) were proposed to improve the permeability of CO2. The asymmetric membrane was prepared using phase inversion method for minimum mass transfer resistance. The effects of POSS loading (2.5-5 wt%) on the membrane characteristic and performance were studied. Furthermore, the MMMs were modified using ionic liquid (IL) [emim][TF2N] with 0.4 M concentration and polydimethylsiloxane (PDMS) to improve the gas selectivity of these MMMs. The morphology of the modification with IL by using scanning electron microscopy (SEM) proved the well dispersion of POSS subjected to improve polymer/filler interface and Energy Dispersive X-ray Spectroscopy (EDX) was conducted to detect elemental distributions of membrane surface. Meanwhile Fourier Transform Infrared (FTIR) were also recorded to check the existence bond in the sample. The gas transport properties of all fabricated membranes were investigated using pure gas permeation tests of N2, CO2 and CH4 and further revealed the membrane with 5 wt% of POSS loading, modified by IL and PDMS coating which exhibit satisfactory of CO2/N2 (24) and CO2/CH4 (9).
Polysulfone (PSF) membrane incorporated with polyamide-tethered Polyhedral Oligomeric Silsequioxane (POSS) for carbon dioxide separation / Nur Izzati Fitri Zaquan Tan